Puller device



. R. C. OSGOOD FULLER DEVICE Filed Dec. 15, 1919 ifiaftented at 3oQi92 4 a-res st-Ar es ecame c.

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rotten nnvrcn- J c I i Application flledDecember 15,1919. Serial No. 344,887.

- Puller Devices, offwhich the following I a full, clear, and exact specification.

My invention relates to puller deyice's. '1 It has for its object to provide an im proved means for pulling'a gear or the like from its shaft, the same being especially adapted to'use in connection with pinions and including improved means whereby such elements which are Ordinarily driven upon a shaijt may be removed therefrom quickly. without marringthe parts and with a minimum of effort on the part ofthe op-' -erator. "f '20 In'the accompanying drawings,- I. have shown, for purposes of illustration, one s t embodiment which my invention may assume in practice' t In these drawings, g

Fig. 1 is a longitudinal sectiohal this form of my improvement- Fig, 2 is a transverse sect'onal new on line 2-'--2 of' Fig; 1. In this illustrative" construction, it Wlll 0 ,I be noted that I have shown a gear 1, herein in the form of a bevel p nion, having a; sleeve 2 which inturii is internally tapered and driven upon the end ofa tapered shaft;

' 3, the sleeve 2.valso being keyed the shaft by. a'key' 4. As shown, thlsfipnuon 1 1s alsoprovided with an axial threaded opening 5 adapted t receive a bolt Ghavmgpn one end threa s' *7 cooperating with the threads in the opening 5 andlhavmg on its other end a turning head'8. Thlsmemher 6 is-in turn internally threaded 1n the same direction as the threaded'portions 5 and 7 but with, threads havinga less steep lead. -Carried in this member-dand enwith its threadsisalso an internal coaxially disposed bolt 9.having a turning head 10 oil one end and throughout-substantially theremainder of its length threaded,

V as at 11, with threads adapted to)cooperate 0 with the internal threads in 'themember- 6.

Here it will also benoted that the threaded portion 11 of this member 9 extends through the member 6 and-engages the end 'ofthe. shaft 3 as an-abutment, the same herein ex- C. Oseoon,

view of tending into acoaziial recess 12 formed in the end of the shaft and threaded, as 'at Q 13,-[0 receive the threaded end of the member- 9, though such-a threaded recess be omitted if desired. l i

In the use of my improvement, the difmay ferential efiect arising from the difierence" 1n lead of the several threadsis used to loosen the pinion. -More specifically, it will be noted that by turning the head 8 in such a manner. as to bring the threaded portion 7 into r egistrywith the threaded portion :5 in the pinion, the

partsjare so adjusted that rotation of the head; 10- will cause the member 9 to be moved into engagement with the end of the recess in the shaft. When the parts have been so adjusted, it will also be evident that a rotation of the I remain j head 8 will then can e thememberfi to be moved inward on the member 9 and that this rotation of the member 6 will cause.

the pinion 1 to be moved outward relati e to ,the member 9, the pinion moving. on

ward at a speed equal to the difierence between the speed of movement of the memher 6 and the member 9.v More specifically,

it will benotedthat, when the member 6 is threaded in such a manneras, when ro tated through a complete revolution, to move 1/7 of an inch, and the member 9 is .so threaded as, when rotated through inch, the adjustment of the member 6' rela- I tive to the member 9, as described, will a speed of 3/70 of an inch for eachcomplete revolution of the member 6a cause the pinion to be moved outward at 'As a result of my improvement, it has been found that even the hardest driven pinion may be removed without marring any parts and with great facility,thereby materially reducing the time heretofore consumed in the removal ofsuch a part. It

will alsofibe evident that due to the 'sim- -plicity of my improved means, the same may be applied'at small expense wherever desired and adapted to remove various el e-- v understood that this form of the same is "shown-for purposes ofillustration and that the invention may be modifiedi and emas i a complete revolution, to move 1/10 of an,

. bodied in other forms without departing from its spirit or the scope of the appended claims.

-What' I claim as new and desire to by Letters Patentisz 1 v 1. In'a pulleddevice, a plurality of cosecure axially disposed threadedly interengaged members the outer one of which is adapted r to move relative to the other during 0pera- '19 threads of a greater lead than the threads" tion of' the device and which has external between. said members. v i p 2. Ina means' for removing a stuck gear from a shaft, a pair of members operatively connected during removal of a gear respec- 'tively togetherandto the gear by threads i of different lead, the member threadedly connected to the gear. beingmovable relative.

tothe other to release said gear.

,3.- In a mechanism for removing a stuck member from a shaft, a pair of coaxially a pair of elements adapted to be operatively.

connected to saidimembers by threads of different lead and threaded to one another by threads of the same. lead as those on oneofsaid members. I

5. In a device for separating a pair of "members, one of which is stuck to the other, a pair of elements adapted-to be operatifily a; connected to said members by threads of element from.

different lead and threadedto one another by threads of the same lead as those on the which the other,element is to be removed. v

6. In a mechanism for removing a stuck gear from a shaft, members threaded during removal of a gear respectively to the gear and shaft and one adjustablein one direc tionrelative to the other to move the gear in an opposite direction.

7. In a mechanism for removing a' stuck gear from a shaft, coaxially disposed members adapted to be threaded respectively to the gear and shaft and one adjustable in one y direction relative to the other to niove the gear in the, oelposite' direction. i

8. In a mec anism for removing a stuck gear from a shaft, a pair of coaxially thread- 'ed members one adapted to be threaded'to -the gear and the other adapted to be thread-- ed'to the shaft and both threaded together, the first of said-members having threads of steeper lead engaging said gear. 7

. 9. In,a.mechanism for removing a gear from a shaft, a' pair of cooperating threaded members threaded during removal of a gear respectively to the shaft and to the gear and threaded to. each other and having the threads between one ofthe same and the gear of different lead from the other 10. In amechanism for removinga gear from a shaft, a bolt adapted to be thread d in the shaft, a coaxial bolt threaded on t e first mentioned bolt -and adapted to be threaded to the gear, the threads between the,last mentioned bolt and gear being of steeper pitch than the threads between the first mentioned bolt and shaft and between said first mentioned bolt and said last mentioned bolt. v

11. In a means for separating a stuck member and a shaft, a pair of elements one ofwhich is adapted to abut against oneof said first mentioned members and the other o-fwhi'ch is adapted to threadedly engage the other of said first mentioned members, i v

shaft and the,

operating members operatively connectedduring coaction to each other and to the elementwhich is to be moved by threads of different lead, said last mentioned threads being of steeper lead and themember pro- ,vided with said last mentioned threads being rotatable relative to the other. a

' 13. In a means for removing a stuck mmber from a member on which it is disposed, a pair of coaxially disposed elements operatively threaded together, one of which is.

threaded to and adapted'to be simultaneously moved withrsaid stuck member, while the other element is engagablewithjhe second mentioned member and remains stationary during removal of said stuck member, the threads between said elements being of less pitch than the threads between one of said elements and said stuckmem'ber, and means to rotate said member threaded to said-stuck membei' for releasing the latter.

14. In a mechanism for removing a stuck member. from a member ,on which it is disposed, a pair of cooperating relatively movable elements, one of which is adapted to engage said second mentioned member and to remainstationary during removal of said first mentioned member and the other of which is adapted to move both relative to said first mentioned member, and to the other or stationary element, saidparts being so formed that their cooperation. causes *movement of said member to be'removed equal to thedifi'erenoe in movement in the lineof removal between ,themovement of said movable element relative to the stationary. element and the movement of said movable element relative to said member to be moved. v

/ which is adapted to be engaged with threads whose bodily longitudinal movement is accompanied by movement of one of said stuck surfaces relative to the other, and the other of which is engageable with a surface in fixed spaced relation to the other of said stuck surfaces, and means for rotating the first mentioned one of said elements to release said surfaces, the threaded engagements specified being with threads of different leads. s v

16. In a mechanism for removing a stuck gear from a shaft, pair of coaxially threaded members one adapted to be threaded to the gear and the other engageable with the shaft and both threaded together, the first of said members having'threads of diflerent lead engaging said gear. v

17. In a mechanism for removing a stuck gear from a shaft, coaxially disposed members, one of which is adapted to be threaded to said gear while the other e ages the shaft, and one of which is adjust file in one direction relative to the other to move said I ROBERT C. OSGOOD.

gnatureb 

